Welcome to Hamilton Construction

From its beginnings in 1939 as a small firm installing concrete road and irrigation systems, Hamilton Construction Co. has grown to become one of the West's leading heavy civil construction contractors. In recent years, our work has focused on transportation projects with an emphasis on major bridge projects, highway interchange, transit, rail, marine, and concrete structural components. Our proven track record of quick response and reliability makes us the first choice of many public agencies and private firms throughout the Western states facing time-critical and emergency situations. We have successfully met and exceeded the demands of Oregon, Washington, Colorado and Alaska Departments of Transportation, TriMet and a diverse group of private customers. Many of our clients have depended on us for decades as their contractor of choice.

Hamilton excels in the successful completion of highly technical projects in a variety of challenging environments ranging from the most densely populated, high traffic urban zones of the I-5 corridor in North Portland, to the most remote regions of Alaska, to structures located in highly sensitive and treasured habitat and recreational areas. Bridges, railroad trestles, cofferdams, highway interchanges, transit projects, specialized foundation work, overlays, project management, and more are part of Hamilton's everyday work.

Our bonding capacity, inventory of construction equipment, and material resources provide us the ability to successfully respond to today's most demanding jobs.

We are experienced with the full range of project delivery systems including Design-Build, CM/GC, and Design/Bid/Build.


Hamilton Construction excels in the successful completion of highly technical projects in a variety of challenging environments throughout the Western states. To see a list of Hamilton's construction projects click here.

Broadway Bridge
Portland, Oregon

McCullough Bridge
North Bend, Oregon

Recent News

  • February 11, 2014:
    Railway Age Magazine reports that a Hamilton Construction Rail Division employee has received national recognition as Field Employee of the Year by the National Railroad Construction and Maintenance Association. Click here to read the article.

  • January 30, 2014:
    The February 2014 issue of the Hamilton Herald is now available. Click here to view the list of Hamilton newsletters.

  • December 20, 2013:
    Hamilton Construction announces five new projects: US101 Cape Creek Bridge Rehabilitation, West Vancouver Freight Access, Port Mackenzie Rail Extension, Fern Valley Interchange, and Troutdale Interchange. Click here to view our current projects.

  • July 25, 2013:
    Dedication ceremonies for the Northbound I-5 Willamette River Bridge were featured on KEZI television. Hamilton is the CM/GC contractor working with the Oregon Dept. of Transportation to deliver this project which doubles the number of travel lanes on I-5 through Eugene/Springfield and pays homage to the indigenous people of the Willamette Valley. Click here to see the news clip.

  • July 25, 2013:
    "Well done, Oregon! Thanks for showing the nation how to put innovation to work." Dedication ceremonies for the Northbound I-5 Willamette River Bridge—now to be known as the Whilamut Passage Bridge—showcased a Who's Who of transportation officials including Federal Highway Administrator Victor Mendez—all of whom congratulated the ODOT/Hamilton team for delivering the project four months ahead of schedule and $12 million under budget! Click here to see Mr. Mendez's comments on the Official Blog of the U.S. Dept. of Transportation.

  • Read all News Articles.